Sapeha

Oleksandr Sapeha
Technical Writer
Kyiv, Ukraine
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Professional Summary
Technical Writer with 6+ years of experience collaborating with cross-functional teams to deliver developer and
system documentation for billing platforms, embedded telecom, IoT, and crypto-related projects/startups.

Work Experience
NDA — Technical Writer
Dates: 2025-03 to 2026-01
• Engineered an automated Docs-as-Code workflow using Go and Bash with LLM APIs to generate OpenAPI
and gRPC reference documentation.
• Created High-Level Design (HLD) diagrams and architecture documentation for SaaS microservices.
• Documented REST APIs and gRPC services.
• Developed SOPs and operational guidelines for L2 Support teams.
• Documented functional requirements for the mobile application.
Technical stack: Go, Bash, OpenAI API, Gemini API, Figma, Mermaid, UML, Postman.
ThingsBoard — Technical Writer (IoT Platform)
Dates: 2024-01 to 2024-10
• Produced end-user documentation.
• Maintained and updated the internal knowledge base.
• Contributed to training materials.
• Documented REST APIs and platform configuration workflows.
Technical stack: Jekyll, Linux CLI, Postman.
Hostiserver Inc — Developer, QA (Billing Platform)
Dates: 2023-02 to 2023-10
• Developed and tested an internal inventory management system.
• Maintained server infrastructure, test environments, and employee workstations.
• Maintained and refactored legacy code.
Technical stack: JavaScript, HTML, Perl, SQL, Swagger, Postman.
Hostiserver Inc — QA, Technical Writer (Billing Platform)
Dates: 2022-08 to 2023-02
• Documented billing and inventory management systems.
• Participated in development and documentation of an internal inventory system.
• Maintained technical documentation for legacy systems.
Technical stack: Perl, JavaScript, HTML, PostgreSQL, Swagger.
Arma Instruments — Technical Writer (Secure Communication)
Dates: 2021-04 to 2022-01
• Developed HLD and architecture documentation for secure hardware and software systems.
• Authored deployment guides and managed project lifecycle documentation and status updates.
Technical stack: Microsoft Office 365, Visio, UML, LaTeX.
Contrast TM — Brand Manager (High-End Audio Manufacturing)
Dates: 2016-01 to 2020-12
• Created technical specifications and marketing copy for high-fidelity audio equipment.
• Directed global marketing strategy and expanded the dealer network internationally.
• Designed 3D models in SolidWorks for documentation and marketing.
• Managed website content, including SEO-oriented product descriptions and updates.
Technical stack: Google Analytics, AdWords, SolidWorks.
Eurotelecom — Network / Support Engineer
Dates: 2013-03 to 2016-01
• Provided L2 and L3 technical support for ISP infrastructure.
• Configured and maintained core network equipment (Cisco, Huawei) and Linux (Debian) servers.
• Maintained fiber-optic backbone lines (diagnostics and repairs coordination).
Technical stack: Linux (Debian), Cisco, Huawei, TCP/IP, VLANs.

Education
National Aviation University (KNAU)
Dates: 2010-01 to 2015-08
Bachelor of Science in Computer Systems (System Programming)

Skills
• Documentation: Docs-as-Code, OpenAPI (Swagger), Postman, Jekyll, Hugo, Markdown, LaTeX.
• Visual engineering: Mermaid, UML, Visio, Figma, SolidWorks.
• Systems and DevOps: Linux (Debian), Jira, Confluence, Git.
• Languages: English (B2), Ukrainian (Native), Russian (Native).